The impellers are mounted directly on the motor shaft for noncontact compression entirely without friction.Maximum operational reliability, even at high differential is ensured by the arrangement of the bearings outside the compression chamber. The gas it taken in though the inlet1.As it enters the side channel 2,the rotating impeller 3 imparts velocity to the gas in the direction of rotation.Centrifugal force in the impeller blades accelerates the gas outward and the pressure increase .Every rotation adds kinetic energy. Resulting in the further increase of the pressure along the side channel .The side channel narrow at the rotor,sweeping the gas off the impeller blades and discharging it though the outlet silencer 4 where it exits the side channel blower.